Good Luck, you're going to need it. Why? Because logic doesn't have a place in the JW dictionary.
If they point to a dog and say it is a cat, you must praise God that the society has the insight to see something that you just can't see. In other words, it doesn't matter what you will point out to the elders, they are always right because they have Jehovah God on their side.
If you feel like arguing with them, or discussing a point that they will always gloss over with a pat answer, pick a subject that has to do with the life and death decisions the society has enforced on its members. Organ transplant, blood policy...... the issues that God has decided to change his mind on. Why would God sacrifice all these people who were upholding his righteous laws, when he would change his mind years later? I haven't heard a good explanation yet to this one.
Mrs. Shakita